3 * Most of this source has been derived from the Linux USB
5 * (C) Copyright Linus Torvalds 1999
6 * (C) Copyright Johannes Erdfelt 1999-2001
7 * (C) Copyright Andreas Gal 1999
8 * (C) Copyright Gregory P. Smith 1999
9 * (C) Copyright Deti Fliegl 1999 (new USB architecture)
10 * (C) Copyright Randy Dunlap 2000
11 * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
12 * (C) Copyright Yggdrasil Computing, Inc. 2000
13 * (usb_device_id matching changes by Adam J. Richter)
16 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
18 * See file CREDITS for list of people who contributed to this
21 * This program is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU General Public License as
23 * published by the Free Software Foundation; either version 2 of
24 * the License, or (at your option) any later version.
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
31 * You should have received a copy of the GNU General Public License
32 * along with this program; if not, write to the Free Software
33 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
41 * Since this is a bootloader, the devices will not be automatic
42 * (re)configured on hotplug, but after a restart of the USB the
45 * For each transfer (except "Interrupt") we wait for completion.
49 #include <asm/processor.h>
50 #include <linux/ctype.h>
51 #include <asm/byteorder.h>
55 #include <asm/4xx_pci.h>
61 #define USB_PRINTF(fmt, args...) printf(fmt , ##args)
63 #define USB_PRINTF(fmt, args...)
66 #define USB_BUFSIZ 512
68 static struct usb_device usb_dev[USB_MAX_DEVICE];
71 static int asynch_allowed;
72 static struct devrequest setup_packet;
74 char usb_started; /* flag for the started/stopped USB status */
76 /**********************************************************************
77 * some forward declerations...
79 void usb_scan_devices(void);
81 int usb_hub_probe(struct usb_device *dev, int ifnum);
82 void usb_hub_reset(void);
83 static int hub_port_reset(struct usb_device *dev, int port,
84 unsigned short *portstat);
86 /***********************************************************************
90 inline void wait_ms(unsigned long ms)
96 /***************************************************************************
108 /* init low_level USB */
110 result = usb_lowlevel_init();
111 /* if lowlevel init is OK, scan the bus for devices
112 * i.e. search HUBs and configure them */
114 printf("scanning bus for devices... ");
120 printf("Error, couldn't init Lowlevel part\n");
126 /******************************************************************************
127 * Stop USB this stops the LowLevel Part and deregisters USB devices.
137 res = usb_lowlevel_stop();
143 * disables the asynch behaviour of the control message. This is used for data
144 * transfers that uses the exclusiv access to the control and bulk messages.
146 void usb_disable_asynch(int disable)
148 asynch_allowed = !disable;
152 /*-------------------------------------------------------------------
158 * submits an Interrupt Message
160 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
161 void *buffer, int transfer_len, int interval)
163 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
167 * submits a control message and waits for comletion (at least timeout * 1ms)
168 * If timeout is 0, we don't wait for completion (used as example to set and
169 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
170 * allow control messages with 0 timeout, by previousely resetting the flag
171 * asynch_allowed (usb_disable_asynch(1)).
172 * returns the transfered length if OK or -1 if error. The transfered length
173 * and the current status are stored in the dev->act_len and dev->status.
175 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
176 unsigned char request, unsigned char requesttype,
177 unsigned short value, unsigned short index,
178 void *data, unsigned short size, int timeout)
180 if ((timeout == 0) && (!asynch_allowed)) {
181 /* request for a asynch control pipe is not allowed */
185 /* set setup command */
186 setup_packet.requesttype = requesttype;
187 setup_packet.request = request;
188 setup_packet.value = cpu_to_le16(value);
189 setup_packet.index = cpu_to_le16(index);
190 setup_packet.length = cpu_to_le16(size);
191 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
192 "value 0x%X index 0x%X length 0x%X\n",
193 request, requesttype, value, index, size);
194 dev->status = USB_ST_NOT_PROC; /*not yet processed */
196 submit_control_msg(dev, pipe, data, size, &setup_packet);
200 if (dev->status != 0) {
202 * Let's wait a while for the timeout to elapse.
203 * It has no real use, but it keeps the interface happy.
212 /*-------------------------------------------------------------------
213 * submits bulk message, and waits for completion. returns 0 if Ok or
215 * synchronous behavior
217 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
218 void *data, int len, int *actual_length, int timeout)
222 dev->status = USB_ST_NOT_PROC; /*not yet processed */
223 submit_bulk_msg(dev, pipe, data, len);
225 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
229 *actual_length = dev->act_len;
230 if (dev->status == 0)
237 /*-------------------------------------------------------------------
242 * returns the max packet size, depending on the pipe direction and
243 * the configurations values
245 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
247 /* direction is out -> use emaxpacket out */
248 if ((pipe & USB_DIR_IN) == 0)
249 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
251 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
254 /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
255 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
256 * when it is inlined in 1 single routine. What happens is that the register r3
257 * is used as loop-count 'i', but gets overwritten later on.
258 * This is clearly a compiler bug, but it is easier to workaround it here than
259 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
260 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
262 static void __attribute__((noinline))
263 usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
267 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
269 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
270 USB_ENDPOINT_XFER_CONTROL) {
271 /* Control => bidirectional */
272 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
273 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
274 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
275 b, dev->epmaxpacketin[b]);
277 if ((ep->bEndpointAddress & 0x80) == 0) {
279 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
280 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
281 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
282 b, dev->epmaxpacketout[b]);
286 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
287 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
288 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
289 b, dev->epmaxpacketin[b]);
296 * set the max packed value of all endpoints in the given configuration
298 int usb_set_maxpacket(struct usb_device *dev)
302 for (i = 0; i < dev->config.bNumInterfaces; i++)
303 for (ii = 0; ii < dev->config.if_desc[i].bNumEndpoints; ii++)
304 usb_set_maxpacket_ep(dev,
305 &dev->config.if_desc[i].ep_desc[ii]);
310 /*******************************************************************************
311 * Parse the config, located in buffer, and fills the dev->config structure.
312 * Note that all little/big endian swapping are done automatically.
314 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
316 struct usb_descriptor_header *head;
317 int index, ifno, epno, curr_if_num;
325 dev->configno = cfgno;
326 head = (struct usb_descriptor_header *) &buffer[0];
327 if (head->bDescriptorType != USB_DT_CONFIG) {
328 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
329 head->bDescriptorType);
332 memcpy(&dev->config, buffer, buffer[0]);
333 le16_to_cpus(&(dev->config.wTotalLength));
334 dev->config.no_of_if = 0;
336 index = dev->config.bLength;
337 /* Ok the first entry must be a configuration entry,
338 * now process the others */
339 head = (struct usb_descriptor_header *) &buffer[index];
340 while (index + 1 < dev->config.wTotalLength) {
341 switch (head->bDescriptorType) {
342 case USB_DT_INTERFACE:
343 if (((struct usb_interface_descriptor *) \
344 &buffer[index])->bInterfaceNumber != curr_if_num) {
345 /* this is a new interface, copy new desc */
346 ifno = dev->config.no_of_if;
347 dev->config.no_of_if++;
348 memcpy(&dev->config.if_desc[ifno],
349 &buffer[index], buffer[index]);
350 dev->config.if_desc[ifno].no_of_ep = 0;
351 dev->config.if_desc[ifno].num_altsetting = 1;
353 dev->config.if_desc[ifno].bInterfaceNumber;
355 /* found alternate setting for the interface */
356 dev->config.if_desc[ifno].num_altsetting++;
359 case USB_DT_ENDPOINT:
360 epno = dev->config.if_desc[ifno].no_of_ep;
361 /* found an endpoint */
362 dev->config.if_desc[ifno].no_of_ep++;
363 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
364 &buffer[index], buffer[index]);
365 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
367 USB_PRINTF("if %d, ep %d\n", ifno, epno);
370 if (head->bLength == 0)
373 USB_PRINTF("unknown Description Type : %x\n",
374 head->bDescriptorType);
377 ch = (unsigned char *)head;
378 for (i = 0; i < head->bLength; i++)
379 USB_PRINTF("%02X ", *ch++);
380 USB_PRINTF("\n\n\n");
384 index += head->bLength;
385 head = (struct usb_descriptor_header *)&buffer[index];
390 /***********************************************************************
392 * endp: endpoint number in bits 0-3;
393 * direction flag in bit 7 (1 = IN, 0 = OUT)
395 int usb_clear_halt(struct usb_device *dev, int pipe)
398 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
400 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
401 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
402 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
404 /* don't clear if failed */
409 * NOTE: we do not get status and verify reset was successful
410 * as some devices are reported to lock up upon this check..
413 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
415 /* toggle is reset on clear */
416 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
421 /**********************************************************************
422 * get_descriptor type
424 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
425 unsigned char index, void *buf, int size)
428 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
429 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
430 (type << 8) + index, 0,
431 buf, size, USB_CNTL_TIMEOUT);
435 /**********************************************************************
436 * gets configuration cfgno and store it in the buffer
438 int usb_get_configuration_no(struct usb_device *dev,
439 unsigned char *buffer, int cfgno)
443 struct usb_config_descriptor *config;
446 config = (struct usb_config_descriptor *)&buffer[0];
447 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
450 printf("unable to get descriptor, error %lX\n",
453 printf("config descriptor too short " \
454 "(expected %i, got %i)\n", 9, result);
457 tmp = le16_to_cpu(config->wTotalLength);
459 if (tmp > USB_BUFSIZ) {
460 USB_PRINTF("usb_get_configuration_no: failed to get " \
461 "descriptor - too long: %d\n", tmp);
465 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
466 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
471 /********************************************************************
472 * set address of a device to the value in dev->devnum.
473 * This can only be done by addressing the device via the default address (0)
475 int usb_set_address(struct usb_device *dev)
479 USB_PRINTF("set address %d\n", dev->devnum);
480 res = usb_control_msg(dev, usb_snddefctrl(dev),
481 USB_REQ_SET_ADDRESS, 0,
483 NULL, 0, USB_CNTL_TIMEOUT);
487 /********************************************************************
488 * set interface number to interface
490 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
492 struct usb_interface_descriptor *if_face = NULL;
495 for (i = 0; i < dev->config.bNumInterfaces; i++) {
496 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
497 if_face = &dev->config.if_desc[i];
502 printf("selecting invalid interface %d", interface);
506 * We should return now for devices with only one alternate setting.
507 * According to 9.4.10 of the Universal Serial Bus Specification
508 * Revision 2.0 such devices can return with a STALL. This results in
509 * some USB sticks timeouting during initialization and then being
510 * unusable in U-Boot.
512 if (if_face->num_altsetting == 1)
515 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
516 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
517 alternate, interface, NULL, 0,
518 USB_CNTL_TIMEOUT * 5);
525 /********************************************************************
526 * set configuration number to configuration
528 int usb_set_configuration(struct usb_device *dev, int configuration)
531 USB_PRINTF("set configuration %d\n", configuration);
532 /* set setup command */
533 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
534 USB_REQ_SET_CONFIGURATION, 0,
536 NULL, 0, USB_CNTL_TIMEOUT);
545 /********************************************************************
546 * set protocol to protocol
548 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
550 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
551 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
552 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
555 /********************************************************************
558 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
560 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
561 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
562 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
565 /********************************************************************
568 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
569 unsigned char id, void *buf, int size)
571 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
573 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
574 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
577 /********************************************************************
578 * get class descriptor
580 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
581 unsigned char type, unsigned char id, void *buf, int size)
583 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
584 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
585 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
588 /********************************************************************
589 * get string index in buffer
591 int usb_get_string(struct usb_device *dev, unsigned short langid,
592 unsigned char index, void *buf, int size)
597 for (i = 0; i < 3; ++i) {
598 /* some devices are flaky */
599 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
600 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
601 (USB_DT_STRING << 8) + index, langid, buf, size,
612 static void usb_try_string_workarounds(unsigned char *buf, int *length)
614 int newlength, oldlength = *length;
616 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
617 if (!isprint(buf[newlength]) || buf[newlength + 1])
627 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
628 unsigned int index, unsigned char *buf)
632 /* Try to read the string descriptor by asking for the maximum
633 * possible number of bytes */
634 rc = usb_get_string(dev, langid, index, buf, 255);
636 /* If that failed try to read the descriptor length, then
637 * ask for just that many bytes */
639 rc = usb_get_string(dev, langid, index, buf, 2);
641 rc = usb_get_string(dev, langid, index, buf, buf[0]);
645 if (!buf[0] && !buf[1])
646 usb_try_string_workarounds(buf, &rc);
648 /* There might be extra junk at the end of the descriptor */
652 rc = rc - (rc & 1); /* force a multiple of two */
662 /********************************************************************
664 * Get string index and translate it to ascii.
665 * returns string length (> 0) or error (< 0)
667 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
669 unsigned char mybuf[USB_BUFSIZ];
674 if (size <= 0 || !buf || !index)
679 /* get langid for strings if it's not yet known */
680 if (!dev->have_langid) {
681 err = usb_string_sub(dev, 0, 0, tbuf);
683 USB_PRINTF("error getting string descriptor 0 " \
684 "(error=%lx)\n", dev->status);
686 } else if (tbuf[0] < 4) {
687 USB_PRINTF("string descriptor 0 too short\n");
690 dev->have_langid = -1;
691 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
692 /* always use the first langid listed */
693 USB_PRINTF("USB device number %d default " \
694 "language ID 0x%x\n",
695 dev->devnum, dev->string_langid);
699 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
703 size--; /* leave room for trailing NULL char in output buffer */
704 for (idx = 0, u = 2; u < err; u += 2) {
707 if (tbuf[u+1]) /* high byte */
708 buf[idx++] = '?'; /* non-ASCII character */
710 buf[idx++] = tbuf[u];
718 /********************************************************************
719 * USB device handling:
720 * the USB device are static allocated [USB_MAX_DEVICE].
724 /* returns a pointer to the device with the index [index].
725 * if the device is not assigned (dev->devnum==-1) returns NULL
727 struct usb_device *usb_get_dev_index(int index)
729 if (usb_dev[index].devnum == -1)
732 return &usb_dev[index];
736 /* returns a pointer of a new device structure or NULL, if
737 * no device struct is available
739 struct usb_device *usb_alloc_new_device(void)
742 USB_PRINTF("New Device %d\n", dev_index);
743 if (dev_index == USB_MAX_DEVICE) {
744 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
747 /* default Address is 0, real addresses start with 1 */
748 usb_dev[dev_index].devnum = dev_index + 1;
749 usb_dev[dev_index].maxchild = 0;
750 for (i = 0; i < USB_MAXCHILDREN; i++)
751 usb_dev[dev_index].children[i] = NULL;
752 usb_dev[dev_index].parent = NULL;
754 return &usb_dev[dev_index - 1];
759 * By the time we get here, the device has gotten a new device ID
760 * and is in the default state. We need to identify the thing and
761 * get the ball rolling..
763 * Returns 0 for success, != 0 for error.
765 int usb_new_device(struct usb_device *dev)
769 unsigned char tmpbuf[USB_BUFSIZ];
771 /* We still haven't set the Address yet */
775 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
776 /* this is the old and known way of initializing devices, it is
777 * different than what Windows and Linux are doing. Windows and Linux
778 * both retrieve 64 bytes while reading the device descriptor
779 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
780 * invalid header while reading 8 bytes as device descriptor. */
781 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
782 dev->maxpacketsize = PACKET_SIZE_8;
783 dev->epmaxpacketin[0] = 8;
784 dev->epmaxpacketout[0] = 8;
786 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
788 printf("\n USB device not responding, " \
789 "giving up (status=%lX)\n", dev->status);
793 /* This is a Windows scheme of initialization sequence, with double
794 * reset of the device (Linux uses the same sequence)
795 * Some equipment is said to work only with such init sequence; this
796 * patch is based on the work by Alan Stern:
797 * http://sourceforge.net/mailarchive/forum.php?
798 * thread_id=5729457&forum_id=5398
800 struct usb_device_descriptor *desc;
802 struct usb_device *parent = dev->parent;
803 unsigned short portstatus;
805 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
806 * only 18 bytes long, this will terminate with a short packet. But if
807 * the maxpacket size is 8 or 16 the device may be waiting to transmit
808 * some more, or keeps on retransmitting the 8 byte header. */
810 desc = (struct usb_device_descriptor *)tmpbuf;
811 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
812 /* Default to 64 byte max packet size */
813 dev->maxpacketsize = PACKET_SIZE_64;
814 dev->epmaxpacketin[0] = 64;
815 dev->epmaxpacketout[0] = 64;
817 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
819 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
823 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
825 /* find the port number we're at */
829 for (j = 0; j < parent->maxchild; j++) {
830 if (parent->children[j] == dev) {
836 printf("usb_new_device:cannot locate device's port.\n");
840 /* reset the port for the second time */
841 err = hub_port_reset(dev->parent, port, &portstatus);
843 printf("\n Couldn't reset port %i\n", port);
849 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
850 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
851 switch (dev->descriptor.bMaxPacketSize0) {
853 dev->maxpacketsize = PACKET_SIZE_8;
856 dev->maxpacketsize = PACKET_SIZE_16;
859 dev->maxpacketsize = PACKET_SIZE_32;
862 dev->maxpacketsize = PACKET_SIZE_64;
867 err = usb_set_address(dev); /* set address */
870 printf("\n USB device not accepting new address " \
871 "(error=%lX)\n", dev->status);
875 wait_ms(10); /* Let the SET_ADDRESS settle */
877 tmp = sizeof(dev->descriptor);
879 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
880 &dev->descriptor, sizeof(dev->descriptor));
883 printf("unable to get device descriptor (error=%d)\n",
886 printf("USB device descriptor short read " \
887 "(expected %i, got %i)\n", tmp, err);
890 /* correct le values */
891 le16_to_cpus(&dev->descriptor.bcdUSB);
892 le16_to_cpus(&dev->descriptor.idVendor);
893 le16_to_cpus(&dev->descriptor.idProduct);
894 le16_to_cpus(&dev->descriptor.bcdDevice);
895 /* only support for one config for now */
896 usb_get_configuration_no(dev, &tmpbuf[0], 0);
897 usb_parse_config(dev, &tmpbuf[0], 0);
898 usb_set_maxpacket(dev);
899 /* we set the default configuration here */
900 if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
901 printf("failed to set default configuration " \
902 "len %d, status %lX\n", dev->act_len, dev->status);
905 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
906 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
907 dev->descriptor.iSerialNumber);
908 memset(dev->mf, 0, sizeof(dev->mf));
909 memset(dev->prod, 0, sizeof(dev->prod));
910 memset(dev->serial, 0, sizeof(dev->serial));
911 if (dev->descriptor.iManufacturer)
912 usb_string(dev, dev->descriptor.iManufacturer,
913 dev->mf, sizeof(dev->mf));
914 if (dev->descriptor.iProduct)
915 usb_string(dev, dev->descriptor.iProduct,
916 dev->prod, sizeof(dev->prod));
917 if (dev->descriptor.iSerialNumber)
918 usb_string(dev, dev->descriptor.iSerialNumber,
919 dev->serial, sizeof(dev->serial));
920 USB_PRINTF("Manufacturer %s\n", dev->mf);
921 USB_PRINTF("Product %s\n", dev->prod);
922 USB_PRINTF("SerialNumber %s\n", dev->serial);
923 /* now prode if the device is a hub */
924 usb_hub_probe(dev, 0);
928 /* build device Tree */
929 void usb_scan_devices(void)
932 struct usb_device *dev;
934 /* first make all devices unknown */
935 for (i = 0; i < USB_MAX_DEVICE; i++) {
936 memset(&usb_dev[i], 0, sizeof(struct usb_device));
937 usb_dev[i].devnum = -1;
940 /* device 0 is always present (root hub, so let it analyze) */
941 dev = usb_alloc_new_device();
943 printf("%d USB Device(s) found\n", dev_index);
944 /* insert "driver" if possible */
945 #ifdef CONFIG_USB_KEYBOARD
947 USB_PRINTF("scan end\n");
952 /****************************************************************************
954 * Probes device for being a hub and configurate it
960 #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
962 #define USB_HUB_PRINTF(fmt, args...)
966 static struct usb_hub_device hub_dev[USB_MAX_HUB];
967 static int usb_hub_index;
970 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
972 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
973 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
974 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
977 int usb_clear_hub_feature(struct usb_device *dev, int feature)
979 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
980 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
981 0, NULL, 0, USB_CNTL_TIMEOUT);
984 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
986 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
987 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
988 port, NULL, 0, USB_CNTL_TIMEOUT);
991 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
993 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
994 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
995 port, NULL, 0, USB_CNTL_TIMEOUT);
998 int usb_get_hub_status(struct usb_device *dev, void *data)
1000 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1001 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1002 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1005 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1007 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1008 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1009 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1013 static void usb_hub_power_on(struct usb_hub_device *hub)
1016 struct usb_device *dev;
1018 dev = hub->pusb_dev;
1019 /* Enable power to the ports */
1020 USB_HUB_PRINTF("enabling power on all ports\n");
1021 for (i = 0; i < dev->maxchild; i++) {
1022 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1023 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1024 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1028 void usb_hub_reset(void)
1033 struct usb_hub_device *usb_hub_allocate(void)
1035 if (usb_hub_index < USB_MAX_HUB)
1036 return &hub_dev[usb_hub_index++];
1038 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1044 static inline char *portspeed(int portstatus)
1046 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1048 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1054 static int hub_port_reset(struct usb_device *dev, int port,
1055 unsigned short *portstat)
1058 struct usb_port_status portsts;
1059 unsigned short portstatus, portchange;
1061 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1062 for (tries = 0; tries < MAX_TRIES; tries++) {
1064 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1067 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1068 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1072 portstatus = le16_to_cpu(portsts.wPortStatus);
1073 portchange = le16_to_cpu(portsts.wPortChange);
1075 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1076 portstatus, portchange,
1077 portspeed(portstatus));
1079 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1080 " USB_PORT_STAT_ENABLE %d\n",
1081 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1082 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1083 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1085 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1086 !(portstatus & USB_PORT_STAT_CONNECTION))
1089 if (portstatus & USB_PORT_STAT_ENABLE)
1095 if (tries == MAX_TRIES) {
1096 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1097 "disabling port.\n", port + 1, MAX_TRIES);
1098 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1102 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1103 *portstat = portstatus;
1108 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1110 struct usb_device *usb;
1111 struct usb_port_status portsts;
1112 unsigned short portstatus, portchange;
1115 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1116 USB_HUB_PRINTF("get_port_status failed\n");
1120 portstatus = le16_to_cpu(portsts.wPortStatus);
1121 portchange = le16_to_cpu(portsts.wPortChange);
1122 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1123 portstatus, portchange, portspeed(portstatus));
1125 /* Clear the connection change status */
1126 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1128 /* Disconnect any existing devices under this port */
1129 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1130 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1131 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1132 /* Return now if nothing is connected */
1133 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1138 /* Reset the port */
1139 if (hub_port_reset(dev, port, &portstatus) < 0) {
1140 printf("cannot reset port %i!?\n", port + 1);
1146 /* Allocate a new device struct for it */
1147 usb = usb_alloc_new_device();
1149 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1150 usb->speed = USB_SPEED_HIGH;
1151 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1152 usb->speed = USB_SPEED_LOW;
1154 usb->speed = USB_SPEED_FULL;
1156 dev->children[port] = usb;
1158 /* Run it through the hoops (find a driver, etc) */
1159 if (usb_new_device(usb)) {
1160 /* Woops, disable the port */
1161 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1162 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1167 int usb_hub_configure(struct usb_device *dev)
1169 unsigned char buffer[USB_BUFSIZ], *bitmap;
1170 struct usb_hub_descriptor *descriptor;
1171 struct usb_hub_status *hubsts;
1173 struct usb_hub_device *hub;
1175 /* "allocate" Hub device */
1176 hub = usb_hub_allocate();
1179 hub->pusb_dev = dev;
1180 /* Get the the hub descriptor */
1181 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1182 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1183 "descriptor, giving up %lX\n", dev->status);
1186 descriptor = (struct usb_hub_descriptor *)buffer;
1188 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1189 i = descriptor->bLength;
1190 if (i > USB_BUFSIZ) {
1191 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1192 "descriptor - too long: %d\n",
1193 descriptor->bLength);
1197 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1198 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1199 "descriptor 2nd giving up %lX\n", dev->status);
1202 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1203 /* adjust 16bit values */
1204 hub->desc.wHubCharacteristics =
1205 le16_to_cpu(descriptor->wHubCharacteristics);
1206 /* set the bitmap */
1207 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1208 /* devices not removable by default */
1209 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1210 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1211 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1213 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1214 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1216 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1217 hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
1219 dev->maxchild = descriptor->bNbrPorts;
1220 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1222 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1224 USB_HUB_PRINTF("ganged power switching\n");
1227 USB_HUB_PRINTF("individual port power switching\n");
1231 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1235 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1236 USB_HUB_PRINTF("part of a compound device\n");
1238 USB_HUB_PRINTF("standalone hub\n");
1240 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1242 USB_HUB_PRINTF("global over-current protection\n");
1245 USB_HUB_PRINTF("individual port over-current protection\n");
1249 USB_HUB_PRINTF("no over-current protection\n");
1253 USB_HUB_PRINTF("power on to power good time: %dms\n",
1254 descriptor->bPwrOn2PwrGood * 2);
1255 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1256 descriptor->bHubContrCurrent);
1258 for (i = 0; i < dev->maxchild; i++)
1259 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1260 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1261 (1 << ((i + 1) % 8)) ? " not" : "");
1263 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1264 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1265 "too long: %d\n", descriptor->bLength);
1269 if (usb_get_hub_status(dev, buffer) < 0) {
1270 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1275 hubsts = (struct usb_hub_status *)buffer;
1276 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1277 le16_to_cpu(hubsts->wHubStatus),
1278 le16_to_cpu(hubsts->wHubChange));
1279 USB_HUB_PRINTF("local power source is %s\n",
1280 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1281 "lost (inactive)" : "good");
1282 USB_HUB_PRINTF("%sover-current condition exists\n",
1283 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1285 usb_hub_power_on(hub);
1287 for (i = 0; i < dev->maxchild; i++) {
1288 struct usb_port_status portsts;
1289 unsigned short portstatus, portchange;
1291 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1292 USB_HUB_PRINTF("get_port_status failed\n");
1296 portstatus = le16_to_cpu(portsts.wPortStatus);
1297 portchange = le16_to_cpu(portsts.wPortChange);
1298 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1299 i + 1, portstatus, portchange);
1301 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1302 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1303 usb_hub_port_connect_change(dev, i);
1305 if (portchange & USB_PORT_STAT_C_ENABLE) {
1306 USB_HUB_PRINTF("port %d enable change, status %x\n",
1308 usb_clear_port_feature(dev, i + 1,
1309 USB_PORT_FEAT_C_ENABLE);
1311 /* EM interference sometimes causes bad shielded USB
1312 * devices to be shutdown by the hub, this hack enables
1313 * them again. Works at least with mouse driver */
1314 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1315 (portstatus & USB_PORT_STAT_CONNECTION) &&
1316 ((dev->children[i]))) {
1317 USB_HUB_PRINTF("already running port %i " \
1318 "disabled by hub (EMI?), " \
1319 "re-enabling...\n", i + 1);
1320 usb_hub_port_connect_change(dev, i);
1323 if (portstatus & USB_PORT_STAT_SUSPEND) {
1324 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1325 usb_clear_port_feature(dev, i + 1,
1326 USB_PORT_FEAT_SUSPEND);
1329 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1330 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1331 usb_clear_port_feature(dev, i + 1,
1332 USB_PORT_FEAT_C_OVER_CURRENT);
1333 usb_hub_power_on(hub);
1336 if (portchange & USB_PORT_STAT_C_RESET) {
1337 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1338 usb_clear_port_feature(dev, i + 1,
1339 USB_PORT_FEAT_C_RESET);
1341 } /* end for i all ports */
1346 int usb_hub_probe(struct usb_device *dev, int ifnum)
1348 struct usb_interface_descriptor *iface;
1349 struct usb_endpoint_descriptor *ep;
1352 iface = &dev->config.if_desc[ifnum];
1354 if (iface->bInterfaceClass != USB_CLASS_HUB)
1356 /* Some hubs have a subclass of 1, which AFAICT according to the */
1357 /* specs is not defined, but it works */
1358 if ((iface->bInterfaceSubClass != 0) &&
1359 (iface->bInterfaceSubClass != 1))
1361 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1362 if (iface->bNumEndpoints != 1)
1364 ep = &iface->ep_desc[0];
1365 /* Output endpoint? Curiousier and curiousier.. */
1366 if (!(ep->bEndpointAddress & USB_DIR_IN))
1368 /* If it's not an interrupt endpoint, we'd better punt! */
1369 if ((ep->bmAttributes & 3) != 3)
1371 /* We found a hub */
1372 USB_HUB_PRINTF("USB hub found\n");
1373 ret = usb_hub_configure(dev);